Additive for water-added bio fuel, water-added bio fuel, and method of producing the same

ABSTRACT

An additive for water-added bio fuel of the present invention includes: sodium hypochlorite; sodium hydroxide; hydrochloric acid; magnesium chloride; and calcium hydroxide, and makes the water soluble in the fuel oil. Further, a method of producing an additive for water-added bio fuel of the present invention includes: a step of agitating and mixing by putting sodium hydroxide into a solution of sodium hypochlorite; a step of agitating and mixing by putting magnesium chloride and calcium hydroxide into a solution of sodium hypochlorite; and a step of agitating and mixing the two types of solutions.

CROSS-REFERENCE TO RELATED APPLICATIONS

This international application claims the benefit of Japanese Patent Application No. 2010-256168 filed Nov. 16, 2010 in the Japan Patent Office, and the entire disclosure of Japanese Patent Application No. 2010-256168 is incorporated herein by reference.

1. Technical Field

The present invention relates to an additive for water-added bio fuel, water-added bio fuel using the additive, and a method of producing the same.

2. Background Art

Recently, in view of high oil prices, depletion problem of fossil fuel being earth resources, and reduction in greenhouse effect gases, such as CO₂, or environmental pollutants emitted when using them and leading to the destruction of the global environment, research of fuel obtained by mixing water of proper quantity into a fuel oil, generally known as emulsion fuel, has been done actively.

Emulsion fuel is generally a fuel obtained by mechanically agitating a fuel oil (heavy oil, kerosene, gas oil, waste oil, etc.) added with water and surface active agent so as to disperse the water in the fuel oil, and is publicly known as a fuel effective to a certain degree to reduce a consumption amount of fuel and environmental pollutants associated thereto. Such emulsion fuel is known, for example, in Patent Documents 1 to 5 as follows:

PRIOR ART DOCUMENTS Patent Documents

Patent Document 1: Japanese Examined Patent Application Publication No. 2010-77418

Patent Document 2: Japanese Examined Patent Application Publication No. 2009-51939

Patent Document 3: Japanese Examined Patent Application Publication No. 2008-150421

Patent Document 4: Japanese Examined Patent Application Publication No. 2007-510046

Patent Document 5: Japanese Examined Patent Application Publication No. 2006-188616

SUMMARY OF THE INVENTION Problems to be Solved by the Invention

However, with conventional emulsion fuels, fuel oil and water are separated in a relatively short period of time after producing; most of the oil components move to the upper layer and most of the water components move to the lower layer, which may lead to a two-layer structure. Such emulsion fuel has various disadvantages or problems, such as difficulties in use of, in storage (storing), or in transporting, of the emulsion fuel having the two-layer structure, decrease in combustion efficiency, combustion calorie, or thermal efficiency due to hydrous influence, which may result in reducing fuel economy, corrosion of a combustion chamber, or the like. Besides, in view of high viscous property of the fuel oil itself, it is rather difficult to mix water into the fuel oil.

Accordingly, despite research and development of such emulsion fuel over the years resulting from the confluence of these factors, most have stopped in the research stages, which does not lead to widespread usage in the market.

Purposes of the Present Invention

It is an object of the present invention to provide an additive for water-added bio fuel, and a method of producing the same, by which water particles are fined and dispersed uniformly through the whole fuel oil, thereby inhibiting emulsifying and making soluble.

It is another object of the present invention to provide a water-added bio fuel that can be inhibited from being two-layer structured or having fuel oil and water separated and can be stored and transported over a long period of time with no quality degradation after producing and a method of producing the same. It is still another object of the present invention to provide a water-added bio fuel and a method of producing the same, by which combustion efficiency and combustion calorie can be enhanced compared to common fuel and emission of greenhouse effect gases, such as CO₂, or environmental pollutants can be reduced.

Means for Solving the Problems

The present invention is as follows, which was achieved to address the objects described above.

An additive for water-added bio fuel of the present invention is added into a raw material of the water-added bio fuel so as to obtain the water-added bio fuel by making water soluble in a fuel oil. The additive for water-added bio fuel of the present invention includes: sodium hypochlorite; sodium hydroxide; hydrochloric acid; magnesium chloride; and calcium hydroxide.

Regarding the above described additive for water-added bio fuel, its composition may be 95.5 to 104.5 parts by weight of the sodium hypochlorite (12% solution), 1.68 to 3.26 parts by weight of the sodium hydroxide, 0.8 to 1.2 parts by weight of the hydrochloric acid (20% solution), 0.01 to 0.02 parts by weight of the magnesium chloride, and 0.01-0.02 parts by weight of the calcium hydroxide

A method of producing an additive for water-added bio fuel of the present invention includes the steps of: agitating and mixing by putting sodium hydroxide into a solution of sodium hypochlorite; agitating and mixing by putting magnesium chloride and calcium hydroxide into a solution of hydrochloric acid; and agitating and mixing these two types of solutions.

According to the above described method of producing an additive for water-added bio fuel, 1.68 to 3.26 parts by weight of the sodium hydroxide may be put into 95.5 to 104.5 parts by weight of the sodium hypochlorite (12% solution) in the step of agitating and mixing by putting the sodium hydroxide into the solution of the sodium hypochlorite, and 0.01 to 0.02 parts by weight of the magnesium chloride and 0.01 to 0.02 parts by weight of the calcium hydroxide may be put into 0.8 to 1.2 parts by weight of the hydrochloric acid (20% solution) in the step of agitating and mixing by putting the magnesium chloride and the calcium hydroxide into the solution of the hydrochloric acid.

The water-added bio fuel of the present invention is obtained by combining water and any of the above described additives for the water-added bio fuel with the fuel oil.

Regarding the water-added bio fuel, the fuel oil may be one type or two or more types of fuel oils chosen from a group consisted of a C-type heavy oil, a crude oil, and an waste oil.

Regarding the water-added bio fuel, its composition may be 70 to 90 parts by weight of the fuel oil, 10 to 27 parts by weight of the water, and 2 to 3 parts by weight of the additive for water-added bio fuel.

A method of producing a water-added bio fuel of the present invention includes the steps of: agitating and mixing 2 to 3 parts by weight of any one of the above described additives for the water-added bio fuel and 10 to 27 parts by weight of water; and mixing and agitating while adding the mixed solution into 70 to 90 parts by weight of the fuel oil.

At the above-described method of producing the water-added bio fuel, the agitating and mixing may be performed for 5 to 15 minutes at the step of agitating and mixing 2 to 3 parts by weight of the additive for water-added bio fuel and 10 to 27 parts by weight of water.

At the above-described method of producing the water-added bio fuel, the agitating and mixing may be performed for 5 to 15 minutes at the step of mixing and agitating while adding the mixed solution into 70 to 90 parts by weight of the fuel oil.

Effects of the Invention

The present invention can provide an additive for water-added bio fuel that can make water particles fine, disperse water uniformly through a whole fuel oil, and inhibit emulsifying to make water soluble, and a method of producing the same.

Further, the present invention can provide a water-added bio fuel that can be stored and transported over a long period of time with no quality loss after producing by inhibiting separation and a two-layer structure of a fuel oil and water, and can reduce emission of greenhouse effect gases, such as CO₂, and environmental pollutants while improving a combustion efficiency and combustion calorie, compared to a normal fuel and a method of producing the same.

MODE FOR CARRYING OUT THE INVENTION

An additive for water-added bio fuel and a water-added bio fuel using the same according to the present invention are described. In the specification and scope of the claims of the present application, the term “making soluble” includes a meaning that a substance, such as water, which is not dissolved in nature or is less subject to be dissolved in a solvent, becomes able to be dissolved in the solvent.

Main properties of raw materials or components of the additive for water-added bio fuel and of the water-added bio fuel of the present invention are briefly described below. Any of the raw materials or components has been in use for various uses at a general market, widely available, and relatively reasonable, thereby being easily prepared.

Sodium hypochlorite (sodium hypochlorite)—also called hypochlorite of soda—is strong alkaline and unstable that is therefore usually stored as a water solution. Further, sodium hypochlorite has a characteristic odor and possesses oxidizing, bleaching, and sterilizing functions. According to the present invention, for example, a 12% solution can be used.

Sodium hydroxide (sodium hydroxide)—also called caustic soda—is a colorless, odorless, solid substance at a normal temperature. Further, sodium hydroxide has a high degree of deliquescence and, therefore, it gradually absorbs water and becomes a solution state if it is left in the air.

Hydrochloric acid (hydrochloric acid) is one of the typical acids and has a strong acid property. Industrial uses are remarkably versatile, such as medicines, agricultural chemicals, and combining flavorings. According to the present invention, for example, a 20% solution (dilute hydrochloric acid) may be used.

Magnesium chloride (magnesium chloride) has a deliquescent property and remarkably easily dissolves in water, ethanol, or the like. Bittern including this is used to make a soybean curd (tofu) or the like.

Calcium hydroxide (calcium hydroxide) is also called hydrated lime, and the solution shows a strong alkaline property and is used as a test reagent that simply detects carbon dioxide. In addition, the calcium hydroxide is often used as powder to draw white lines for ball games on the ground and so on.

The components of the additive for water-added bio fuel are each described next in terms of their operation (function). A surface tension of fuel oil is relatively small (weak), whereas a surface tension of water is relatively large (strong). Sodium hypochlorite serves to make water easily soluble in the fuel oil by making the surface tensions of the fuel oil and water smaller and by agitating and mixing.

Magnesium chloride serves to make water particles fine.

Calcium hydroxide serves to enhance a modifying operation by which a degree of water surface tension is brought close to a fuel oil surface tension.

Sodium hydroxide serves, in contrast to calcium hydroxide, to assist a modifying operation by which a degree of fuel oil surface tension is brought close to a water surface tension.

Hydrochloric acid serves to make water particles fine, to combine the fuel oil with water, to make water soluble, and to have water enveloped in the fuel oil.

Regarding producing the additive for water-added bio fuel, when the composition ratio of the sodium hypochlorite (12% solution) exceeds 104.5 parts by weight, the progress of the operation to make the surface tensions of the fuel oil and water smaller slows down, which is likely to inhibit the functions of other components. When the composition ratio of the sodium hypochlorite (12% solution) does not reach 95.5 parts by weight, it is likely not possible to make the surface tensions of the fuel oil and water sufficiently small. Accordingly, in either case, water included in the water-added bio fuel using the additive for water-added bio fuel is not easily dissolved in the fuel oil.

When the composition ratio of the sodium hydroxide exceeds 3.26 parts by weight, it is likely that the modifying operation slows down, by which a degree of fuel oil surface tension is brought close to a water surface tension. When the composition ratio of the sodium hydroxide is less than 1.68 parts by weight, it is likely that the aforementioned modifying operation is not carried out enough. Accordingly, in either case, water included in the water-added bio fuel using the additive for water-added bio fuel is not easily dissolved in the fuel oil.

When the composition ratio of the hydrochloric acid (20% solution) exceeds 1.2 parts by weight, it is likely that an operation slows down to make water particles fine, to combine the fuel oil with water, to make water soluble, and to have water enveloped in the fuel oil. When the composition ratio of the hydrochloric acid is less than 0.8 parts by weight, it is likely that the operation is not carried out enough to make the water soluble and have the water included in the fuel oil. Accordingly, in either case, water contained in the water-added bio fuel using the additive for water-added bio fuel is not easily dissolved in the fuel oil.

When the composition ratio of the magnesium chloride exceeds 0.02 parts by weight, an operation to make water particles fine is likely to slow down. When the composition ratio of the magnesium chloride is less than 0.01 parts by weight, the operation is likely not to be carried out enough. Accordingly, in either case, water included in the water-added bio fuel using the additive for water-added bio fuel is not easily dissolved in the fuel oil.

When the composition ratio of the calcium hydroxide exceeds 0.02 parts by weight, it is likely that the modifying operation slows down to approximate a degree of water surface tension to a fuel oil surface tension. When the composition ratio of the calcium hydroxide is less than 0.01 parts by weight, it is likely that the aforementioned modifying operation is not carried out enough. Accordingly, in either case, water included in the water-added bio fuel using the additive for water-added bio fuel is not easily dissolved in the fuel oil.

Regarding producing the water-added bio fuel, when the composition ratio of the fuel oil is less than 70 parts by weight, it is likely not to be able to obtain combustion efficiency and combustion calorie sufficiently. When the composition ratio of the fuel oil is greater than 90 parts by weight, it is likely to increase an emission of environmental pollutants or greenhouse effect gases such as CO₂, which may lead to the destruction of the global environment.

When the composition ratio of water exceeds 27 parts by weight, it is likely not to be able to obtain combustion efficiency and combustion calorie sufficiently. When the composition ratio of water is less than 10 parts by weight, it is likely to increase an emission of environmental pollutants or greenhouse effect gases such as CO2, which may lead to the destruction of the global environment.

When the composition ratio of the additive for water-added bio fuel is less than 2 parts by weight, it is likely not to be able to make water soluble and to have water enveloped in the fuel oil by making water particles fine and by combining the fuel oil with water. Further, when the composition ratio of the additive for water-added bio fuel exceeds 3 parts by weight, it is likely not to be able to obtain a sufficient degree of combustion efficiency and combustion calorie with a relative decrease in the composition ratio of the fuel oil even if it is possible to make the water soluble and to envelop the water in the fuel oil.

Producing the additive for water-added bio fuel is carried out through a step of preparing a solution A by putting 1.68 to 3.26 parts by weight of sodium hydroxide into 95.5 to 104.5 parts by weight of sodium hypochlorite (12% solution) in an agitator and by agitating and mixing, a step of preparing a solution B by putting 0.01 to 0.02 parts by weight of magnesium chloride and 0.01 to 0.02 parts by weight of calcium hydroxide into 0.8 to 1.2 parts by weight of hydrochloric acid (20% solution) and by agitating and mixing, and after that, a step of reacting the solution A and the solution B by agitating and mixing the solution A and the solution B prepared through the above two steps. The reaction after mixing the solution A and the solution B can be confirmed by that a temperature of the solution rises up to 40 to 55° C.

The water-added bio fuel has a composition ratio of a fuel oil, the additive for water-added bio fuel, and water of 70 to 90 parts by weight of the fuel oil, 2 to 3 parts by weight of the additive for water-added bio fuel, and 10 to 27 parts by weight of the water. The fuel oil used for producing the water-added bio fuel may be any one of, for example, C-type heavy oil, crude oil, and waste oil, or may be used by mixing a plurality of types thereof. The C-type heavy oil is a type of heavy oil and is classified by kinetic viscosity according to Japanese Industrial Standards (JIS).

Producing the water-added bio fuel is carried out through a step of mixing 2 to 3 parts by weight of an additive for water-added bio fuel and 10 to 27 parts by weight of water and agitating for a predetermined period of time, and a step of agitating and mixing while adding the mixed liquid obtained into 70 to 90 parts by weight of fuel, so as to make the water soluble and to have the water included. This agitation time may be, for example, 5 to 15 minutes for each of the steps.

Operation

The most significant element to make fuel oil and water separated or to make a two-layer structure after mixing the fuel oil and water is first a big difference between the surface tensions of fuel oil and water.

When a water-added bio fuel is produced by use of the additive for water-added bio fuel of the present invention, it appears to be possible to uniformly disperse the water particles in fuel oil particles by making the water particles fine, and to envelop the water in the fuel oil by making the water soluble relative to the fuel oil, by agitation because degrees of surface tensions of the fuel oil and the water are brought to be the same or remarkably approximate to the same. This reason is not clear, but even if the reason is not correct, it does not have the faintest influence on achieving the present invention.

Regarding the water-added bio fuel of the present invention, it appears that water particles are made fine under the presence of the additive for water-added bio fuel and are made soluble in the fuel oil. Therefore, the fuel oil and the water are not separated or do not make a two-layer structure as time elapses, and it is possible to keep a state having no separation or two-layer structure even several years after producing, i.e., a state where water particles are soluble in the fuel oil.

At a time of combustion of the water-added bio fuel, compared to a case where a commonly used fuel oil itself is used as fuel, the combustion is performed in a state closer to full burning. Therefore, it is possible to improve combustion efficiency or increase combustion calorie and to inhibit emission of greenhouse effect gases, such as CO₂, or environmental pollutants. This is found not only from the obtained data described later but also from the color or amount of soot in the furnace being a testing facility.

An embodiment of the present invention will be described hereinafter. However, the present invention shall not be limited hereto.

Embodiment Method of Producing an Additive for Water-Added Bio Fuel

A method of producing an additive for water-added bio fuel will be described first.

Regarding the additive for water-added bio fuel, first of all, a solution A is prepared, under a normal temperature, by putting 2.47 kg of sodium hydroxide into 100 kg of sodium hypochlorite (12% solution) in an agitator, and by agitating and mixing for about 10 minutes. Next, a solution B is prepared by putting 15 g of magnesium chloride and 15 g of calcium hydroxide into 1 kg of hydrochloric acid (20% solution) in a different agitator, and by agitating and mixing for about 10 minutes. The agitation time may be arbitrarily adjusted depending on a composition ratio or quantity of each of the aforementioned components.

Next, agitation and mixing are performed for about minutes while pouring the solution B into an agitating tank having the solution A therein. After that, as a result of occurrence of reaction heat, the temperature of the solution gradually rises up to about 40° C. to 55° C. The temperature may vary beyond the aforementioned temperature range according to conditions such as outside air temperature.

The above described rising of the solution temperature is considered to represent the progress of chemical reaction, but the mechanism is not clear. As the agitation then continues for a while, the temperature of the solution returns to its original temperature (normal temperature); this is considered to represent the end of the reaction. In this way, 103.5 kg of the additive for water-added bio fuel is produced.

The agitator used through the above-described method of producing is arbitrary or a publicly known one. An agitating method is represented by various ways, such as use of an agitator, a circulator pump, a line mixer, or the like. According to the embodiment, agitation was performed by a simple way of circulating by means of a commercially available circulator pump. The agitating power, such as a pumping amount of the circulator pump, is not specifically limited, but heavy agitation, which may create air bubbles, is not needed.

Method of Producing a Water-Added Bio Fuel

A method of producing a water-added bio fuel using the additive for water-added bio fuel produced as described above will be described next.

Using an agitator, 3 kg (3 parts by weight) of the additive for water-added bio fuel produced as described above and 23 kg (23 parts by weight) of water are agitated and mixed. Agitation is performed for about 10 minutes, but the agitation time is not limited hereto and may be arbitrarily adjusted depending on a composition ratio or quantity of each of the aforementioned raw materials.

It is desirable that the additive for water-added bio fuel is mixed evenly and uniformly in the fuel oil by sufficiently agitating through the above-described agitating operation. Accordingly, it is possible to disperse water, which is added after this, uniformly in the fuel oil, to make the water soluble relative to the fuel oil, and to have the water included in the fuel oil.

Next, further agitation is performed while adding the solution obtained by mixing the additive for water-added bio fuel and the water into 74 kg (74 parts by weight) of C-type heavy oil being the fuel oil. According to the embodiment, this agitation time is about 10 minutes, but it is not limited hereto and may be arbitrarily adjusted depending on a composition ratio or quantity of each of the raw materials.

Concerning producing of the water-added bio fuel, it is desirable that, when the solution obtained by mixing the additive for water-added bio fuel and water are agitated and mixed in the fuel oil, each of them are agitated and mixed for reaction, being controlled at the same temperature within a range between 60° C. and 80° C. When the fuel temperature is less than 60° C., the fuel has a relatively low fluidity, so that it is difficult to sufficiently disperse water in the fuel, to make the water soluble relative to the fuel oil, and to have the water included in the fuel oil. In view of a production cost, there is no need to make the temperature higher than 80° C.

Through the above described steps, water particles become fine and disperse uniformly in the fuel oil, and thus water is made soluble and enveloped in the fuel oil. Therefore, 100 kg of the water-added bio fuel is produced without being emulsified.

Regarding the order of mixing each component when producing the water-added bio fuel, it is important to first put the additive for water-added bio fuel into water and then to put this into the fuel oil. If the additive for water-added bio fuel is mixed directly with the fuel oil, it is sludgy and viscous, so that it should be noted to make sure of the mixing order.

An agitator used for producing the water-added bio fuel is a line mixer according to the embodiment, but some other agitators may be used. For the water-added bio fuel using the additive for water-added bio fuel according to the embodiment, a type of water being the raw material to be used is not specifically limited. That is, so-called hard water or soft water may be used, and further regular tap water or well water also may be used.

Separation Test

Described below is the results of monitoring appearances of the water-added bio fuel with time according to the embodiment. A fuel being a comparative subject is a raw material of the water-added bio fuel of the embodiment, and a commonly available C-type heavy oil was used.

Table 1 explains data indicating appearances of the C-type heavy oil and samples S1 and S2 of the water-added bio fuel according to the embodiment. The samples S1 and S2 are different in terms of an elapsed time after producing the water-added bio fuel.

TABLE 1 Water- Water- Added Bio Fuel Added Bio Fuel Sample S1 Sample S2 C-type heavy (immediately after (1533 days elapsed oil producing) after producing) Appearance brownish-red brownish-red color, brownish-red color, color, low low transparency, low transparency, transparency same as C-type same as Sample S1 heavy oil Separation — Not Found Not Found or Two-Layer Structure

[Analysis]

As seen from Table 1, the sample S1 immediately after producing exhibits a brownish-red color having a low transparency like the C-type heavy oil that is a fuel oil being a raw material, and a large change was not found. Further, there was little change in appearance between the sample S1 and the sample S2 for which 1533 days (about four years and three months) had elapsed after producing. Further, the samples S1 and S2 both did not exhibit separation or two-layer structure of the C-type heavy oil being the fuel oil and the water. Thus, it has been found that the water-added bio fuel according to the embodiment is maintained at a state where no separation or two-layer structure of the fuel oil and the water is generated over a long period of time after producing.

Combustion Test

The results of the combustion test of the water-added bio fuel of the embodiment will be described below.

A C-type heavy oil that is a raw material of the water-added bio fuel of the embodiment was used as a fuel being a comparative subject. The combustion test of the C-type heavy oil and the water-added bio fuel of the embodiment was performed by use of a burner boiler. Data was measured at the Institute of Environment and Hygiene by use of a measurement method following Japanese Industrial Standards (JIS), such as the Orsat method, chemiluminescence method, neutralization titration method, or the like.

Specifically, exhaust gas composition, such as CO₂, was measured by the Orsat method, nitrogen oxide density was measured by the chemiluminescence method, and sulfur oxide density was measured by the neutralization titration method.

The burner boiler used was a greenhouse heater SK-200KM-DF manufactured by Sanshu Sangyo Co. Ltd., and the circulator pump used was a 15GPE6.4 type manufactured by Ebara Corporation, and the line mixer was a static mixer F type manufactured by OHR Laboratory Corporation.

Table 2 explains data indicating combustion performance of the C-type heavy oil and the samples S1 and S2 of the water-added bio fuel according to the embodiment. The samples S1 and S2 are different in terms of an elapsed time after producing the water-added bio fuel.

TABLE 2 Water-Added Bio Fuel Water-Added Bio Sample S1 Fuel Sample S2 C-type (immediately after (1533 days elapsed heavy oil producing) after producing) CO₂ Density  6.3%  4.3%  4.4% nitrogen oxide 363.9 ppm 200.6 ppm 208.8 ppm (SOX) sulfur oxide  65.7 ppm  48.4 ppm  48.9 ppm (NOX) Combustion 750° C. 761° C. 755° C. Temperature Combustion 81.5% 91.1% 91.0% Efficiency

Analysis

As seen from Table 2, it was found that, a combustion temperature of the water-added bio fuel of the embodiment was improved moderately compared to a combustion temperature of the C-type heavy oil. It was also found that the water-added bio fuel remarkably reduced an amount of emission of various environmental pollutants, such as CO₂ being a greenhouse effect gas, nitrogen oxide, sulfur oxide, and so on. Further, despite the elapsed times after producing the water-added bio fuel, the samples S1 and S2 exhibited approximately the same value.

It is summarized at least as below from the results of the combustion test.

That is, combustion of the water-added bio fuel by use of a burner boiler is combustion of oil drops of the C-type heavy oil being the fuel oil, and it appears that an air-fuel mixture is made of oxygen in the air and the C-type heavy oil vaporized by physical phenomenon at the surfaces of the C-type heavy oil drops so that combustion is progressed. Water particles included in the water-added bio fuel are applied with radiation heat by this combustion and are heated up. It is considered that secondary atomization of the C-type heavy oil occurs by that the temperature reaches a boiling point to generate micro-explosions one after another and the C-type heavy oil drops surrounding are then made scattered.

As described above, it appears that the C-type heavy oil being the fuel oil is made fine (ultrafine) instantly that therefore has an increased area to contact with air, which leads to a rapid and full combustion, resulting in inhibiting generation of smoke or unburned carbon in combustion exhaust gas. In addition, the increase in the area to contact with air can inhibit an amount of air required for combustion from being excessive and reduce heat to be carried away by exhaust gas, thereby resulting in a large energy-saving effect.

In order to satisfy this condition, it is most important to make water particles fine and disperse the water particles uniformly in fuel oil particles and to have water included in the fuel oil. However, since water particles usually have a relatively large surface tension, it is difficult to make the water particles, for example down to 20 nm to 40 nm. With conventional emulsion fuel, since it was not possible to make water particles sufficiently fine, the emulsion fuel was emulsified.

Table 3 indicates a comparison of features between the water-added bio fuel of the present embodiment and a conventional emulsion fuel. Regarding emulsion fuels, there are a number of companies even only in Japan that have conducted experiments and research, and such emulsion fuels are easily obtained. Here, one of the emulsion fuels is employed as a comparative example.

TABLE 3 Emulsion Water-Added Item Fuel Bio Fuel Water Particle Diameter Micrometer Nanometer Unit Unit Transparency Not Transparent Transparent Fuel and Water separation Separated Not Separated Storage, Transporting Not possible Possible Combustion Efficiency, Down Not Down Fuel Economy Combustion Temperature, Down UP Combustion Calorie Influence on Combustion Engine Subject to Not Subject to such as Combustion Chamber Corrosion Corrosion Reignite Having Having No Trouble Trouble

It appears that, concerning the additive for water-added bio fuel of the embodiment, a particle diameter of water mixed in the fuel oil can be made fine down to 20 nm to 40 nm. It can be proved that the water particle diameter is in a unit of nanometers, by that the water is made soluble in the C-type heavy oil and the fuel is not emulsified, so that there is not much difference of color and transparency relative to the C-type heavy oil. Therefore, the water-added bio fuel is not just a mixture of the fuel oil and water and can be made to a state where fine water particles are dispersed uniformly in particles of the C-type heavy oil being fuel oil and water is made soluble and included in the fuel oil. Further, the size of water particles included in the emulsion fuel is a micrometer unit, and since they can not be made fine down to a nanometer unit, the emulsion fuel is emulsified.

As described above, concerning the water-added bio fuel according to the embodiment, compared to the emulsion fuel, combustion temperature, combustion efficiency, and combustion calorie are high and fuel economy is not lowered. Further, since water particles are made soluble in the fuel oil, the fuel oil and water are not emulsified, separated, or do not establish a two-layer structure. Therefore, it is possible to store and transport the water-added bio fuel over a long period of time and to reduce influence on a combustion engine, such as corrosion of an apparatus.

The present invention has been described hereinabove but should not be considered restrictive to the above embodiment. The above embodiment is an example, and any of what includes substantially identical structure and effects to the technical concept described in the scope of claims of the present invention shall be included in the technical scope of the present invention. 

1. An additive for water-added bio fuel, the additive comprising: sodium hypochlorite; sodium hydroxide; hydrochloric acid; magnesium chloride; and calcium hydroxide, wherein the additive makes water soluble in a fuel oil.
 2. The additive for water-added bio fuel according to claim 1, wherein a composition of the additive for water-added bio fuel is 95.5 to 104.5 parts by weight of the sodium hypochlorite (12% solution), 1.68 to 3.26 parts by weight of the sodium hydroxide, 0.8 to 1.2 parts by weight of the hydrochloric acid (20% solution), 0.01 to 0.02 parts by weight of the magnesium chloride, and 0.01-0.02 part by weight of the calcium hydroxide.
 3. A method of producing an additive for water-added bio fuel, the method comprising the steps of: agitating and mixing by putting sodium hydroxide into a solution of sodium hypochlorite; agitating and mixing by putting magnesium chloride and calcium hydroxide into a solution of hydrochloric acid; and agitating and mixing these two types of solutions.
 4. The method of producing an additive for water-added bio fuel according to claim 3, wherein, at the step of agitating and mixing by putting the sodium hydroxide into the solution of the sodium hypochlorite, 1.68 to 3.26 parts by weight of the sodium hydroxide is put into 95.5 to 104.5 parts by weight of the sodium hypochlorite (12% solution), and at the step of agitating and mixing by putting the magnesium chloride and the calcium hydroxide into the solution of the hydrochloric acid, 0.01 to 0.02 parts by weight of the magnesium chloride and 0.01 to 0.02 parts by weight of the calcium hydroxide are put into 0.8 to 1.2 parts by weight of the hydrochloric acid (20% solution).
 5. A water-added bio fuel obtained by combining water and the additive for water-added bio fuel according to claim 1 with the fuel oil.
 6. The water-added bio fuel according to claim 5, wherein the fuel oil is one type or two or more types of fuel oils chosen from a group consisted of a C-type heavy oil, a crude oil, and an waste oil.
 7. The water-added bio fuel according to claim 5, wherein a composition of the water-added bio fuel is 70 to 90 parts by weight of the fuel oil, 10 to 27 parts by weight of the water, and 2 to 3 parts by weight of the additive for water-added bio fuel.
 8. A method of producing a water-added bio fuel comprising the steps of: agitating and mixing 2 to 3 parts by weight of the additive for water-added bio fuel according to claim 1 and 10 to 27 parts by weight of water; and mixing and agitating while adding the mixed solution into 70 to 90 parts by weight of the fuel oil.
 9. The method of producing a water-added bio fuel according to claim 8, wherein the agitating and mixing are performed for 5 to 15 minutes at the step of agitating and mixing 2 to 3 parts by weight of the additive for water-added bio fuel and 10 to 27 parts by weight of water.
 10. The method of producing a water-added bio fuel according to claim 8, wherein the agitating and mixing are performed for 5 to 15 minutes at the step of mixing and agitating while adding the mixed solution into 70 to 90 parts by weight of the fuel oil. 